Skuba
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About this app
SKUBA — The Diver's Offline Toolkit
Plan dives, blend gas, and check specs on the boat—even with wet hands.
Skuba is the professional diving toolkit built to be used right before you jump. We replaced complex spreadsheets and guesswork with a fast, high-contrast interface that works offline in the middle of the ocean.
Whether you are a recreational diver checking your Nitrox MOD or a technical diver planning a complex trimix blend, Skuba gives you the precise answers you need in under 30 seconds.
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WHY DIVERS CHOOSE SKUBA
✅ 100% Offline – No signal? No problem. Works everywhere.
✅ Boat-Ready UI – Big buttons designed for wet thumbs and glaring sun.
✅ Physics-Based – Calculations account for real-world factors like gas temperature and water density.
✅ Zero Ads – No distractions, just tools.
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MASTER YOUR BUOYANCY
Stop guessing how much lead you need. Our advanced Buoyancy Calculator simulates your trim for the entire dive.
• Phase Simulation: Check if you can sink at the start and hold your safety stop at the end.
• Precision Physics: Accounts for the weight of the gas you breathe, water salinity (Salt/Fresh), and specific cylinder buoyancy (Alu/Steel).
• Failure Analysis: Verify you can swim up your rig if your wing fails.
COMMUNICATE CLEARLY
Forget a signal? Look it up instantly in our Dive Signals Reference.
• Visual Library: Clear illustrations for Recreational, Technical, Light, and Touch signals.
• Smart Search: Type "Shark" or "Out of Air" to find the right hand sign instantly.
• Teach & Learn: Perfect for students and instructors reviewing before a dive.
BLEND GAS LIKE A PRO
The most advanced Gas Blender for your phone.
• Step-by-Step Plans: Get exact fill instructions for Nitrox and Trimix.
• Real-World Accuracy: Accounts for Van der Waals forces, gas temperature, and "hot fills."
• Top-Off Support: Calculate blends using the gas already left in your tank.
PLAN YOUR DIVE
• Best Mix: Find the optimal O₂% for your target depth.
• Gas Analyzer: Instantly calculate EAD (Equivalent Air Depth) and PPO₂.
• Gas Usage: Estimate consumption based on your personal breathing rate (SAC/RMV).
• Reserve Planning: Built-in support for Rock Bottom, Rule of Thirds, and Rule of Sixths.
ESSENTIAL UTILITIES
• Cylinder Database: Specs for common tanks worldwide (buoyancy, weight, capacity).
• Unit Converter: Seamlessly convert Depth, Pressure, and Volume between Metric and Imperial.
═══════════════════════════════════════
WHO IS THIS FOR?
• Recreational Divers wanting safe, verified Nitrox plans.
• Technical Divers managing complex gear configurations and mixes.
• Instructors demonstrating theory and signals to students.
SAFETY NOTICE
Skuba is for planning and education only. It is not a substitute for proper training, certification, or a dive computer. Always verify critical information and dive within your limits.
Plan dives, blend gas, and check specs on the boat—even with wet hands.
Skuba is the professional diving toolkit built to be used right before you jump. We replaced complex spreadsheets and guesswork with a fast, high-contrast interface that works offline in the middle of the ocean.
Whether you are a recreational diver checking your Nitrox MOD or a technical diver planning a complex trimix blend, Skuba gives you the precise answers you need in under 30 seconds.
═══════════════════════════════════════
WHY DIVERS CHOOSE SKUBA
✅ 100% Offline – No signal? No problem. Works everywhere.
✅ Boat-Ready UI – Big buttons designed for wet thumbs and glaring sun.
✅ Physics-Based – Calculations account for real-world factors like gas temperature and water density.
✅ Zero Ads – No distractions, just tools.
═══════════════════════════════════════
MASTER YOUR BUOYANCY
Stop guessing how much lead you need. Our advanced Buoyancy Calculator simulates your trim for the entire dive.
• Phase Simulation: Check if you can sink at the start and hold your safety stop at the end.
• Precision Physics: Accounts for the weight of the gas you breathe, water salinity (Salt/Fresh), and specific cylinder buoyancy (Alu/Steel).
• Failure Analysis: Verify you can swim up your rig if your wing fails.
COMMUNICATE CLEARLY
Forget a signal? Look it up instantly in our Dive Signals Reference.
• Visual Library: Clear illustrations for Recreational, Technical, Light, and Touch signals.
• Smart Search: Type "Shark" or "Out of Air" to find the right hand sign instantly.
• Teach & Learn: Perfect for students and instructors reviewing before a dive.
BLEND GAS LIKE A PRO
The most advanced Gas Blender for your phone.
• Step-by-Step Plans: Get exact fill instructions for Nitrox and Trimix.
• Real-World Accuracy: Accounts for Van der Waals forces, gas temperature, and "hot fills."
• Top-Off Support: Calculate blends using the gas already left in your tank.
PLAN YOUR DIVE
• Best Mix: Find the optimal O₂% for your target depth.
• Gas Analyzer: Instantly calculate EAD (Equivalent Air Depth) and PPO₂.
• Gas Usage: Estimate consumption based on your personal breathing rate (SAC/RMV).
• Reserve Planning: Built-in support for Rock Bottom, Rule of Thirds, and Rule of Sixths.
ESSENTIAL UTILITIES
• Cylinder Database: Specs for common tanks worldwide (buoyancy, weight, capacity).
• Unit Converter: Seamlessly convert Depth, Pressure, and Volume between Metric and Imperial.
═══════════════════════════════════════
WHO IS THIS FOR?
• Recreational Divers wanting safe, verified Nitrox plans.
• Technical Divers managing complex gear configurations and mixes.
• Instructors demonstrating theory and signals to students.
SAFETY NOTICE
Skuba is for planning and education only. It is not a substitute for proper training, certification, or a dive computer. Always verify critical information and dive within your limits.
Updated on
Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
This app may collect these data types
App activity, App info and performance, and Device or other IDs
Data is encrypted in transit
Data can’t be deleted
What’s new
NEW: Buoyancy Calculator
Stop guessing your weight. Our advanced physics engine simulates your trim across the dive, checking if you can sink at the start and hold your safety stop at the end.
NEW: Dive Signals Reference
A searchable library of Recreational, Technical, and Light signals in your pocket. Find any signal instantly.
Plus: Improved Gas Blender accuracy and performance optimizations.
Stop guessing your weight. Our advanced physics engine simulates your trim across the dive, checking if you can sink at the start and hold your safety stop at the end.
NEW: Dive Signals Reference
A searchable library of Recreational, Technical, and Light signals in your pocket. Find any signal instantly.
Plus: Improved Gas Blender accuracy and performance optimizations.
App support
About the developer
Ronny Majani
hello@ronnymajani.com
Unit 16/89 Tower St
Panania NSW 2213
Australia
